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Anirudhh
17 Jan 2017

A student prepared an aqueous solution of CuSO4 in beaker X and an aqueous solution of FeSO4 in beaker Y. He then dropped some iron pieces in beaker X and some zinc pieces in beaker Y. After about 10 hours he observed that the solutions in X and Y respectively appear:

(A) blue and green

(B) colourless and pale green

(C) colourless and light blue

(D) greenish and colourless

or
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Produced Metals React Acid Name Metal Non Metal Liquid Room Temperature Sour Substances Kept Copper Brass Vessels Understand Precipitation Reaction Give One Example Name Following Metal Used Long Distance Cable Wires Ii Metal Added Gold Harden Iii Metal Forms Two TMatch Following Non Metals Trains Cars Metals Crackers Fertilisers Mercury Wrapping Food Aluminium TStudent Takes Zinc Granules Test Tube Adds Dilute Hydrochloric Acid Would Observe Colour Zinc GranulState Whether True False Non Metals Beaten Thin Sheets Ii Touch Hot Metallic Part Pan Get Hurt Iii AAnswer Following Questions Super Cooled Liquid Ii Write Name Alloy Used Making Coins B Constructing Following Beaten Thin Sheets Pencil Lead Silver Aluminium CoalDifferentiate Metals Non Metals Metals Soft Yes Name Label Following Reactions According Types Explain Answers B C E Write Three Differences Metals Non Metals Name Two Metals Ductile Well Malleable Magnesium Powder React Much Rapidly Magnesium Ribbon Dilute Sulphuric Acid 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Name Precipitate Formed Write Balanced Chemical Equation Reaction Given Chemical Reaction Example Type Reaction Sea Water Added Solution Silver Nitrate White Precipitate Formed Explain Rohan Studied Displacement Reactions Class Elder Brother Told Performing Experiment Chemistry LaboraExample Neutralisation Reaction Name Given Reaction White Precipitate Formed Barium Chloride Solution Reacts Sodium Sulphate Solution Name Write ChemicaRoom Temperature Metals Occur Solid State Comment Statement Given Metals Melt Held Palm Time Aluminium Tin Lead Gallium ZincDuctilityConductivityPiece Iron Beaten Thin Sheets Whereas Graphite Cannot Complete Given Table Basis Effect Hammering Given Substances Material Change Shape Iron Nail Piece CCopper Vessel Acquire Green Coating Exposed Moist Air Zinc Plate Dipped Copper Sulphate Solution Sometime Reddish Brown Mass Deposited Zinc Plate State ReMagnesium Behave Steam Passed Explain Giving Chemical Equations Metals Used Making Machinery Chemical Nature Evolved Gas Found Provided Dry Cell Bulb Holder Wires Using Objects Distinguish Piece Coal Graphite Essential Life Required Living Beings Breathing Makes 78 Earth Atmosphere Used Manufacturing Fertilizers Used Process Water Purification Recommended Acids Stored Metal Containers Element Reacts Oxygen Form Oxide Dissolves Dilute Hydrochloric Acid Resulting Solution Turns Colour Element X Brittle Also Forms Acidic Oxide Given Elements X Represent Magnesium Copper Sodium SulphurMetals Lose Shine Exposed Air Long Time Classify Given Elements Basis Nature Oxides Formed Graphite Sodium Magnesium SiliconNon Metal Lustrous Metal Exists Liquid State Slo 1 8 2 1 4 1 1 Property Aluminium Explains Use Making Foils Name Two Metals Easily Cut Help Knife Solution Obtained Given Figures Turn Colour Blue Litmus Solution Red Handle Screw Driver Made Reason Given Objects Must Inserted Circuit Ensure Bulb Glows Phosphorus Stored Water Electric Wires Made Copper Aluminium Name Non Metal Good Conductor Electricity Given Elements Would Yield Basic Oxide P Ca SiHappens Iron Nail Dipped Copper Sulphate Solution Consider Figure Given X Made Rubber Aluminium Two Beakers Contain Colourless Solutions Magnesium Oxide Carbon Dioxide Solutions Beakers IdentifiedMetals Used Making Cooking Utensils Following Reactions Cannot Take Place Give Reasons Justify Answer Iron Zinc Sulphate Iron Sulphate ZElement X Ductile Forms Basic Oxide Given Elements X Represent Carbon Magnesium Sulphur SiliconMalleability Complete Given Table Using Available Data Metal Used Reaction Hydrochloric Acid Zinc Magnesium CoppeGive Suitable Reasons Answers Aluminium Vessels Lose Shine Time Happens Iron Articles Exposed Moist Air Metal Liquid Room Temperature Mark Correct Alternative Following Added 5 09 Get 5 5 0 41 B 0 59 C 0 49 0 95Use Following Information Answer Next Question Property Substances Virtue Beaten Thin Sheets Called Mark Correct Alternative Following 0 012 0 15 0 8 B 0 08 C 0 008 0 0018Mark Correct Alternative Following 0 3 0 3 0 3 2 7 B 0 27 C 0 027 NoneMark Correct Alternative Following 5 Kg 5 G Written Decimal Notation 5 5 Kg B 5 05 Kg C 5 005 Kg 5 0Mark Correct Alternative Following 0 012 1 5 0 8 B 0 08 C 0 008 NoneWrite Expression Following Statements Using Brackets Four Multiplied Sum 13 7 Ii Eight Multiplied DiSimplify Following 7 109Following Oxides Acidic Nature Simplify Following 9 105Simplify Following 17 109Simplify Following 16 108Following Substances React Sulphuric Acid Mark Correct Alternative Following 102119 Standard Form 67 B 67 C 617 NoneMark Correct Alternative Following Rational Number Equal 23 1025 B 10 15 C 96 NoneMark Correct Alternative Following Additive Identity Element Set Whole Numbers 0 B 1 C 1 NoneMark Correct Alternative Following Following Zero 0 0 B 03 C 7 73 9 0Mark Correct Alternative Following 38 X 24 Equivalent Rational Numbers X 3 B 6 C 9 12Mark Correct Alternative Following 27 45 Expressed Rational Number Denominator 5 Numerator 3 B 3 C 6Following Metals Found Human Blood Point 0 2 Equidistant Points B 3 P C P 5 Find P Cbse 2014 Abcd Rectangle Whose Three Vertices B 4 0 C 4 3 0 3 Find Length One Diagonal Cbse 2014 Point P K 1 2 Equidistant Points 3 K B K 5 Find Values K Cbse 2014 Find Ratio Point P X 2 Divides Join 12 5 B 4 3 Cbse 2014 Prove Diagonals Rectangle Abcd Vertices 2 1 B 5 1 C 5 6 2 6 Equal Bisect Cbse 2014 Find Lengths Medians Ad Abc Whose Vertices 7 3 B 5 3 C 3 1 Cbse 2014 Find Area Circle Whose Circumference 8 Cbse 2014 Find Perimeter Semicircular Protractor Whose Diameter 14 Cm Cbse 2009 Following Substances Poor Conductor Heat Electricity Radii Two Circles 19 Cm 9 Cm Find Radius Circle Circumference Equal Sum Circumferences Two Circles Radii Two Circles 8 Cm 6 Cm Find Radius Circle Area Equal Sum Areas Two Circles Following Non Metallic Substances Highest Melting Point Copper Reacts Concentrated Nitric Acid Produce Acidic Oxides Following Options Represents Correct SeCircumferences Two Circles Ratio 2 3 Ratio Areas Calcium Violently Reacts Water ProduceSquare Inscribed Circle Find Ratio Areas Circle Square Circumference Circle 8 Cm Find Area Sector Whose Central Angle 72 Two Circular Pieces Equal Radii Maximum Area Touching Cut Rectangular Cardboard Dimensions 14 Cm 7 CRectangular Sheet Paper Abcd Ab 40 Cm Ad 28 Cm Semicircular Portion Bc Diameter Cut Find Area RemainGiven Figure Oabc Square Side 7 Cm Copb Quadrant Circle Centre C Find Area Shaded Region Median 10 12 X 6 18 10 Following Correct 6 X 10 B X 6 C X 18 Either B Use Following Information Answer Next Question Shweta Two Objects E X One Metal Non Metal Beats X HaUse Following Information Answer Next Question Preeti Two Similar Looking Objects E X Produces RingiTwo Elements Exist Liquid State Mercury Bromine Order Find Metallic Character Shashank Connects CircUse Following Information Answer Next Question Substance Reacting Sodium Hydroxide Forms Complex SubUse Following Information Answer Next Question Iron Nails Added Two Beakers X Contain Aqueous SolutiRajesh Two Different Substances X Test Tube Adds 5 Ml Sulphuric Acid Test Tubes Observes Gas Evolves10 Cards Numbered 1 10 Card Drawn Randomly Probability Getting Even Numbered Card 110 B 15 C 12 25Dice Rolled Probability Getting Even Prime 16 B 13 C 12 56100 Cards Numbered 1 100 Box Card Drawn Box Probability Event 12 Number Favourable Cases Event 20 B Remplissez Les Blancs Use Following Information Answer Next Question Assignment Rajesh Find Nature Substance Used Make Thi Use Following Information Answer Next Question Four Metal Rods Made Lead Zinc Gold Silver Equal Thic Following Elements Used Making School Bells Use Following Information Answer Next Question Ankur Cooking Rice Pan Using Hot Plate Accidently Tou 12 Element Use Nitrogen Used Fertilisers Ii Aluminium B Used Machinery Iii Iron C Used Electrical Wires Name Given Reactions Write General Equation Reaction Solid Right Circular Cone Height 120 Cm Radius 60 Cm Placed Right Circular Cylinder Full Water HeighObserved Dil Hcl Reacts Magnesium Ii CopperLustrous Non MetalLow Density MetalHardest Non MetalPoint Distance 13 Cm Centre Circle Radius 5 Cm Ap Aq Tangents Circle P Q Tangent Bc Drawn Point R LyTwo Wires Equal Lengths One Copper Another Brass Thickness One Used Electrical Transmission Lines IiCopper Aluminium Lead Taken Three Different Test Tubes Concentrated Hno3 Hcl H2o Added Respectively Consider Figures Given Two Cases Bulb Glow Following Elements Lowest Melting Point Aluminium Gallium Copper GoldNeha Burnt Coal Excess Oxygen Allowed Gas Formed Process Pass Blue Litmus Solution Observe Change Rahul Wants Make Electrical Circuit Would Prefer Bronze Copper Steel Alloy Iron Carbon Would Effect Ductility Steel Level Carbon Increased Complete Given Figure Rajni Carried Reactions Chemistry Lab Element Reaction Warm Hcl Reaction H2so4 Magnesium Yes Yes CopMetal Used Making Foils Used Decoration SweetsMetal Whose Foils Used Wrapping FoodAbundant Metal Earth CrustMixture Iron Sulphur Formed Thoroughly Grinding 7 G Iron Filings 4 G Sulphur Happen Small Amount GivFill Blanks Property Substances Virtue Beaten Thin Sheets Called Characteristic Property React AcidsName Described Acid Name One Acid Causes Acid Rains Identical Blocks Iron Plastic Wood Rubber Placed Sun Interval Time Given Blocks Become Hottest GivenIdentify Type Reactions Following Reactions Belong 2 Naoh H2so4 Na2so4 2h2o B Mg H2o Mgo H2Iron Found Human Blood Non Metals Used Making Crackers Graphite Used Manufacture Pencil Argon Usually Used Fill Weather Balloons Hydrochloric Acid Added Small Amount Substance Test Tube Pop Sound Observed Bringing Burning MatchstMatch Following Column Column B Acidic Oxide Sodium Water Basic Oxide Iron Water Slow Reaction SulphSilver Nitrate Added CopperAluminium Foil Added Hydrochloric AcidShweta Two Objects X One Metal Whereas Non Metal Beats X Hammer Finds Changes Thin Sheet Beats HammeMercury Liquid Metal Liquid Non MetalNon Metal Hammer Powdery Mass Metal Hammer Magnesium Found Plants Sulphur Used Water Purification Process Name Metal Malleable Ductile Fe Cuso4 Feso4 Cu Kind Reaction Given Equation Represent 20 Cylindrical Pillars Building Diameter 50 Cm Height 4 Find Cost Cleaning 14 Per M2 Copper Vessel Exposed Moist Air Acquires Green Coloured Coating Composition Green Coating Corrosion Iron Called Generally Oxides Metals Nature Name Two Metals Hard Strong Curved Surface Area Right Circular Cylinder 4 4 M2 Radius Base 0 7 Find Height Ii Volume Silver Used Making Mirrors Sulphur Heated Presence Air Product Obtained Mixed Water Concluded Acidic Basic Nature Solution ObtaName Compound Produced Magnesium Burnt Air Write Three Differences Metals Non Metals Lateral Surface Area Cylinder 94 2 Cm2 Height 5 Cm Find Radius Base Ii Volume Take 3 14 Write Activity Show Metals Non Metals React Sodium Hydroxide Iron Nails Added Two Beakers X Contain Aqueous Solutions Copper Sulphate Zinc Sulphate Respectively Rajesh Two Different Substances X Test Tube Adds 5 Ml Sulphuric Acid Test Tubes Observes Hydrogen GaSketch Graphs Following Functions F X Tan 2xTwo Solutions Equation Tan X B Sec X C Find Values Sin Cos Calcium Reacts Hydrochloric Acid ProduceProducts Obtained Potassium Sulphate Reacts Barium Iodide Aqueous Medium Use Following Information Answer Next Question Metals Arranged Decreasing Order Reactivities Given MExample Double Displacement ReactionUse Following Information Answer Next Question Copper Turnings Added Clear Solution Silver Nitrate GUse Following Information Answer Next Question Raju Made Electric Circuit Test Electrical ConductiviFind Least Number Divided 20 25 35 40 Leaves Remainders 14 19 29 34 Respectively Distinguish Terms Overloading Short Circuiting Used Domestic Circuits B Coils Electric Toasters MadDefine Hormones Name Hormone Secreted Thyroid Write Function Use Iodised Salt Advised Us Three Pieces Timber 42 49 63 Long Divided Planks Length Greatest Possible Length Plank Many Planks F State One Difference Pollination Fertilization B Man Blood Group Marries Woman Blood Group Daughter Carbon Form Compounds Mainly Covalent Bonding B List Two Reasons Carbon Forming Large Number CompouInformation Inwhich Alternative Incorrectly Matched Homologous Series Compounds List Two Characteristics Homologous Series B Would Observed Adding 5 Al Meant Saying Potential Difference Two Points 1 Volt Name Device Helps Measure Potential Difference Differentiate Animal Plant Fibres Give Two Examples Expansion Solids Equal Size Temperature Increased Amount Agree Give Reasons Temperature Scale Used Scientific Work State Whether Following Statements True False Justify Answer Point P 4 2 Lies Line Segment Joining PState Whether Following Statements True False Justify Answer Points 0 5 0 9 3 6 Collinear Find Coordinates Point Q X Axis Lies Perpendicular Bisector Line Segment Joining Points 5 2 B 4 2 NaUse Following Information Answer Next Question Soft Metal Cut Knife Metal Liquid Room Temperature 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Answer Next Question Way Object Shines Light Falls Known Luster Visual ProRecord Student Name Roll Marks Five Subjects Percentage Marks Stored Following List Strecord Raman 3Following Materials Conduct Heat Use Following Information Answer Next Question Anthony Heats Four Metallic Containers Filled Water AFollowing Materials Conduct Heat Following Tables Correctly Lists Various Materials Good Bad Conductors Heat Use Following Information Answer Next Question Rod Heated One End Temperature End Measured Observed Use Following Information Answer Next Question Screw Rubber Tube Wooden Stick Silver Ring Shown GiveFollowing Objects Good Conductor Heat Use Following Information Answer Next Question Given Table Classifies Various Objects Good Bad ConduUse Following Information Answer Next Question Certain Metal Reddish Brown Color Good Conductor HeatUse Following Information Answer Next Question Reactions Two Different Atoms Groups Atoms InterchangUse Following Information Answer Next Question Silver Nitrate Combines Sodium Chloride Form Silver CUse Following Information Answer Next Question Sodium Hydroxide Reacts Carbonic Acid Form Sodium BicUse Following Information Answer Next Question Single Displacement Reactions Reactions Element Gets Use Following Information Answer Next Question Chemistry Practical Class Students Assigned Task ChecFollowing Processes Involved Double Displacement Reaction Following Equations Example Single Displacement Reaction Following Displacement Reactions Possible Barium Nitrate Ba No3 2 Mixed Sodium Fluoride Naf Aqueous Solution Following Compounds Obtained Use Following Information Answer Next Question Displacement Reactions Involve Replacement Atom GroupUse Following Information Answer Next Question Double Displacement Reaction Two Different Atoms GrouSingle Displacement Reaction Among Following ReactionsFormed One Molecule Potassium Chloride Reacts One Molecule Silver Nitrate Balanced Equation Reaction Iron Oxide Fe2o3 Sulphuric Acid H2so4Use Following Information Answer Next Question Displacement Reaction Reactive Element Takes Place LeAluminium Good Conductor ElectricityUse Following Information Answer Next Question Basic Oxides React Water Form Bases Covalent Acidic OUse Following Information Answer Next Question Little Amount Carbon Phosphorus Potassium Sulphur BurMagnesium Reacts Steam Boiling Water Steam Present Excess Products ObtainedUse Following Information Answer Next Question Metals Elements Tendency Lose Electrons Following EleFollowing Elements Beaten Hammer Breaks Small Pieces Following Elements Lustrous Shiny Surface Following Elements Sonorous Nature Use Following Information Answer Next Question Fish Shellfish Natural Tendency Accumulate Toxic ElemFollowing Properties Attributed Metals Use Following Information Answer Next Question Professor Demonstrating Reaction Zinc Dilute SulfuricUse Following Information Answer Next Question Take Account Given Statements Lab Manual Ii Iii SolutFollowing Statements Metals False Following Elements Metallic Nature Following Elements Non Metallic Nature Use Following Information Answer Next Question Metals Good Thermal Conductors Metal Heated Atoms GaiFollowing Metals Poorest Conductor Heat Use Following Information Answer Next Question Jonathan Constructs Setup Shown Figure Time Drawing PUse Following Information Answer Next Two Questions Agatha Teacher Gave Plate Made Unknown Material Cu Al Used Make Electrical WiresAl Used Manufacture Cooking Utensils BoilersMetal Foil Generally Used Purpose Packing Medicine Tablets Aluminium Reacts Copper Sulphate ProduceZinc Reacts Ferrous Sulphate ProduceFollowing Statements Correct Following Statements Correct AlloyOne Following Substances Alloy Following Alloys Formed Combination Metal Non Metal Following Alloys Use Copper Constituent Use Following Information Answer Question Alloy Article Steel N Electrum Ii Brass Iii P Bronze IvFollowing Alloys Used Make Magnets Following Elements Added Steel 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Discharged Metal FormeThree Metal Pieces X Z Taken Cleaned Sand Paper Separately Put Test Tubes Ii Iii Respectively Contai List Tabular Three Chemical Properties Basis Differentiate Metal Non Metal B Give Reasons Following Write Chemical Equations Following Reactions Calcium Metal Reacts Water Ii Cinnabar Heated PresenceExplain Following Sodium Chloride Ionic Compound Conduct Electricity Solid State However Conduct EleQWould Observe Adding Zinc Granules Freshly Prepared Ferrous Sulphate Solution Give Reason Answer Classify Following Reactions Different Types Agno3 Aq Nacl Aq Agcl Nano3 Aq Ii Cao H2o L Ca Oh 2 Aq Following Metals Used Thermometer Metals Produce Ringing Sound Striking SaidMetals Show Property Malleability Except Non Metal Could Used Antiseptic Property Match Following Non Metals Uses Non Metal Uses Chlorine Fertilisers Ii Oxygen B Disinfectant Iii NitName Metal Widely Used Making Aeroplanes Following Statements Incorrect Match Following Columns Column Column Ii Sulphur Antiseptic B Chlorine Ii Fungicide C Iodine Iii InsAqueous Solution Compound Reacts Silver Nitrate Solution Form White Precipitate Compound B Used AntiName Alloy Contain Aluminium Homogeneous Composition Choose Incorrect Statement Given Reaction Nitric Acid Carbon Carbon Non Metal React Nitric Acid Ii CPiece Metal X Dissolved Colorless Salt Solution Yz Time Color Solution Changes Green Metal Obtained Metal Reacts Nitric Acid Three Different Concentrations X Z Hno3conc X Salt B Gas Ca Hno3conc Salt BSilvery White Metal X Reacts Blue Vitriol Green Vitriol Turns Colorless Metal Oxide Metal X PreventsUse Following Information Answer Next Question Happen Given Granules Test Tube Use Following Information Answer Next Question One Following Required Identify Gas Evolved Reaction Following Chemical Reactions Type Precipitation Reaction Following Reactions Hydrogen Gas Evolved Find Correct Alternative Amongst Following Options Regarding Reaction Metals Water Following Reactions Example Displacement Reaction Omkar Gandhi Resident North India Went Vellore Small Town State Tamil Nadu Southern Part Country PurUnlike Metal Oxides Metal Oxide Metal X Dissolves Water Form Compound Compound Widely Used Paper MakMetal X Burns Air Black Coloured Compound Formed Small Amount Compound Taken Beaker Dilute HydrochloAssertion Copper Strip Placed Solution Silver Nitrate Colour Solution Changes Blue Colourless ReasonAssertion Potato Chips Packaged Nitrogen Gas Reason Nitrogen Gas Present Abundance Nature Compound Obtained Reaction Iron Steam Fe2o3 B Fe3o4 C Feo Fe2o3 Fe3o4Element X Reacts O2 Give Compound High Melting Point Compound Also Soluble Water Element X Likely IrHydrogen Sulphide Gas Passed Blue Solution Copper Sulphate Black Precipitate Copper Sulphide ObtaineFollowing Question Statement Assertion Followed Statement Reason Choose Correct Answer Following ChoFollowing Statements True Reaction Sodium Sulphate Solution Barium Chloride Solution Following Lustrous Sulphur Dioxide Reacts Water Form Compound X X Formed Turn Blue Litmus Paper Red X Beaten Thin Sheets Following Use Non Metal Copper Vessel Exposed Moist Air Long Acquires Dull Green Coating Green Material Formed Mixture Following Example Amphoteric Oxide One Following Statements Correct Displacement Reactions Following Materials Beaten Thin Sheets Happens Magnesium Ribbon Burnt Air Happens Iron Nail Dipped Copper Sulphate Solution Following Metals React Cold Water Bronze Alloy